One problem related to o2 sensor has been reported for the 2000 Toyota Sienna. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2000 Toyota Sienna based on all problems reported for the 2000 Sienna.
Ltr fwd fm fhwa re their defective 2000 Toyota Sienna xle, the van has problems with engine sludge. . . The vehicle started to blow blue smoke and ran rough. The dealer discovered engine gel deposits. The malfunctioning light had come on due to the oxygen sensor per dealer, the brakes squealed when stopped at low speeds(problem continued), and pulled to the left. The dealer could not duplicate. The engine sludge had come back again due to a burnt hole in the valve which was in the piston. The tachometer illumination appeared to be out and the bulb was replaced. The consumer requested reimbursement for the hotel stay and the vehicle rental.